S Models Single Expansion Valve - Manitowoc S300 Technician's Handbook

Operational Analysis
Freeze Cycle
Suction Pressure
_______ ______ _____
1 minute Middle End
Wait 5 minutes into the
freeze cycle.
Compare temperatures of
evaporator inlet and
evaporator outlet.
Inlet _____________° F (°C)
Outlet ___________ ° F (°C)
Difference________ ° F (°C)

S MODELS SINGLE EXPANSION VALVE

1
If suction pressure is High or Low refer to freeze cycle high or low suction pressure problem checklist
page 115 to eliminate problems and/or components not listed on this table before proceeding.
Suction pressure is High
Inlet and outlet
within 7° F (4°C)
of each other
2
Suction pressure is Suction pressure is
Low or Normal
Inlet and outlet
within 7°F (4°C)
Inlet and outlet
not within 7° F (4°C)
of each other Inlet and outlet
-and-
not within 7°F (4°C)
Inlet is colder than
outlet
Inlet is warmer than
3
Suction pressure is
High
of each other
-or-
Inlet and outlet
within 7°F (4°C)
of each other
of each other
-and-
outlet
4
High